Portable electronic device displaying transitional graphical user interface



FIG. 1 is the first image in a sequence for a portable electronic device displaying transitional graphical user interface showing our new design;

FIG. 2 is the second image thereof; and,

FIG. 3 is the third image thereof.

The subject matter in this patent or application includes images that transition between the figures. The process or period in which the images move forms no part of the claimed design.

In the drawings, the long dash-short dash broken lines showing a display screen forms no part of the claimed design. All other broken lines showing the remainder of the graphical user interface and the portable electronic device forms no part of the claimed design. 

CLAIM We claim the ornamental design for a portable electronic device displaying transitional graphical user interface, as shown and described. 